Graphite-veined Quartzite
Meta-sedimentary Quartzite with Carbonaceous/Graphitic Inclusions (SiO2 + C)
metamorphic
Category
Sedimentary Rock (Cryptocrystalline Quartz)
Browse sedimentary rock (cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Red Quartzite (Ferruginous Quartz)
Quartzite (SiO2 with Fe2O3 inclusions)
metamorphic
Quartz on Basalt
Silicon Dioxide (SiO2) on Mafic Igneous Rock
Mineral on Igneous Rock
Massive Quartz
Silicon dioxide (SiO2)
mineral
Gossan (Iron Hat) with Quartz and Chlorite
Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite
Mineral/Metamorphic Substrate
Red Quartzite / Ferruginous Sandstone
Quartzite (SiO2 with iron oxide impurities)
metamorphic
Pink Quartzite
Quartzite (SiO2 with minor iron oxide impurities)
metamorphic
Flint (Chert)
Cryptocrystalline Silica (SiO2)
sedimentary
Quartzite with Quartz Veining
Metamorphosed Sandstone (SiO2 with impurities)
metamorphic
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Ferruginous Quartzite (Iron-stained Quartzite)
Quartzite with Iron oxides (FeO(OH) / Fe2O3)
metamorphic
Quartzite with Iron Inclusions
Metamorphic Quartzite (SiO2 with Fe2O3 trace impurities)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Jasper (Tumbled)
Silicon Dioxide (SiO₂)
sedimentary (cryptocrystalline quartz)
Gastropod Steinkern (Internal Mold Fossil)
Gastropoda (Class); Internal mold or 'Steinkern' composed of Calcium Carbonate (CaCO3) or Sedimentary matrix
sedimentary
Rose Quartz
Silicon dioxide (SiO2)
mineral
Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)
Chalcedony (SiO₂)
Mineral (or mineraloid if microcrystalline)
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Chert (Jasper/Opaline variety)
Silicon Dioxide (SiO2)
sedimentary
Pink Quartzite
Quartzite (primarily SiO2 with trace Fe2O3)
metamorphic
Agate
Silicon Dioxide (SiO2)
mineral
Granite
Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)
igneous
Banded Agate (specifically Carnelian Agate)
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Pyrite in Shale
Iron Disulfide (FeS2)
mineral
Yellow Chalcedony (common opal or chert variant)
Silicon Dioxide (SiO2)
sedimentary (mineraloid/microcrystalline quartz)
Yellow Quartzite (River Pebble)
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Granitic Quartz with Feldspar
Granite (composed primarily of SiO2 and KAlSi3O8)
igneous
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sedimentary
Quartzite with Feldspar
Quartzite (mainly SiO2) with inclusions of Potassium Feldspar (KAlSi3O8)
metamorphic
Red Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Yellow Quartzite
Quartzite (primarily SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite with Iron Oxide (Limonite/Hematite) coating
sedimentary
Jasper and Aquamarine (likely)
Jasper (Cryptocrystalline Quartz (SiO2)), Aquamarine (Beryl (Be3Al2Si6O18))
Sedimentary (Jasper), Mineral (Aquamarine)
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
metamorphic